Heating device.



F. C. INGALLS.

HEATING DEVICE.

APPLICATION FILED JUNE 2a. 1916.

1,295,509. Patented my 25, 1919.

INVENTOR- .F. "VG/41.1.6

ATTORNEY engines using gaseous feeds the carbureter. V

UNITED STATES PATENT OFFICE. I

FRANK CALDWELL INGALLS,

HEATING OF NEWARK, NEW JERSEY.

nnvxcn.

Application filed June as, i

To all whom it may concern:

Be it known that I, FRANK CALDWELL INGALLS, citizen of the United States of America, residing at 881 South 17th street, Newark, New Jersey, have invented a new and useful Heating Device; and I do hereby declare the following to be a full, clear, and exact description of the same.

This invention relates. to new and useful improvements in air heating devices for use in connection with internal 7 combustion engines.

' air therethrough, and also to'provide for heated conductor device. 1 i

switch when in inoperative posit1on.

electrically controlling the operationof the Another object. of the invention; is to provide a device which is simple and economical to construct, most efiicient in use and uickly installed without particularly modi ying an part of'the engine.

To this en ,the inventor has provided -a heating device comprising an -,electric'ally placed in a frame, and inserted in the hot air pipe and retained there in by suitable means, and has also provided a switch which may be manuall brought into opfrative position, but whic' is auto matica after use.

In the drawings, tive purposes only and, therefore, to any particular scalez" Figu pipe with the heating device in position and showing the various connections thereto.

Fi 2 is a horizontal sectional view, taken on t e line 2-2 of Fig. 1, showing the which arefor illustraji not drawn re 1 is an elevation .of the .hotair Fig. 3 is a similar viewshowing the switch in its operative position. j s v Fig. 4 is 'a sectional plan view, taken; on the line 4-4 of Fig. 1, showing one form Specification of Letters Patent.

and thereby. pulls y returned to an inoperative position 3 Onreleasing withdraws outo forming aid in this result,

916. Serial No. 106,386.

of the heating device with means for retainmg the same in position.

Fig. 5 is a sectional view showing another form of the deviceand the manner of retalning the same in position by the use of spring grips. f

Fig. 6 is a view showing another similar form of the device.

2, which may be placed close to the exhaust pipe of the engine .to receive heat therefrom whlle the engine is running, is shown havmg a connection, 3, with the carbureter,4, and carrying the switch, 5, to which is con- Patented Feb. 25, 1919.'

4 Referring now to Fig. 1, the hot air pipe nected the insulated wire, 6, leading to-a.

source of electric current (not shown), as,

- for instance, that which supplies the current for-ignition purposes.

posts 10 and'll which extendthrough the In this channeL-betWeen the Y bmdmg-posts', a coiled spring 12 is said channel.

vided having one end connected toone b1nd-.

2 bythe yoke '8 (Fig. 2),

Theswitchf), which is automatically held I 1 'in an inoperative. position and cannot be accidentally put ing-post 10, and its other end connected to l I a cord13 of insulating materiaL'which cord extends some distance out of the channel,

and is providedwith ah dle gripping,

means 1 1. To operate the switch, the operator simply grasps the end of'thespring 12 into contact. w1th tive (Fig. 2).;

shown a metal four transverse members 16, 17 18 and .19.

springs '20 and21 to assist in maintaining On the member 17 an nsulation 25 is provided, and

the handle of the cord, 13,

the binding-post 11 (Fig.1 the cord, the coiled spring I contact with the bindingin Fig.4, the heater comprises frame 15- having U-shaped ends T m m r lfiand 19 carry colled no end 22-on which anut' 10" on this insulation is secured the exposed end portion of an insulated wire or cable 26, which connects the heating device with the switch 5. This exposed end of the cable 26 is connected, by a plurality of fine heating coils 27 to the members 18 and 19, thus grounding on the hot air pipe 2 and the engine.

In practice the heating coils are usually heated above the ignition point of any vapor of the fuel that might be in the hot air pipe. To prevent any ignition of this vapor, the coils 27are covered with a. gas-tight envelop 27 of mica, asbestos or other suitable material, which holds the vapor from contact with the hot coils.

If desired, the envelop may be omitted, as in Figs. 5 and 6, and the resistance of the coils 27 made so great that the coils are never heated above the ignition point.

In the modification shown in Fig. 5, the frame 45 is shown provided with U-shaped end members, but here the device is shown maintained in position by spring grips 46 and 47 on the members 48 and 49.

In Fig. 6 the frame is shown provided with two members 56 and 57 at one end with one member 58 at the other. The members 56 and 58 carry coiled springs 59 and 60, which are arranged so as to engage opposite walls of the hot air pipe. The member 57 carries an insulating material 62, and around this insulation is secured the exposed end of the cable26, and this exposed end is connected to the coiled spring 60 on the member 58 by means of a plurality of fine heating coils 65.

The operation of the lows The electric current is carried from its source by the insulated wire 6 to the binding-post 10, thence to the coiled spring 12. lVhen the cord 13 is pulled, contact is made device is as folwith the binding-post 11,. and the current passes to the insulated wire or cable 26 and to the bare end thereof. From the bare end of the cable, the current passes to the heating coils and is then grounded on the walls of the pipe by connection with a member of the frame. H

7 Although this invention has many uses in connection with heating air, it. is peculiarly ada ted for use in connection with internal com ustion .engines.

When an engine has been at rest and it is desired to start the same, there-being no exhaust to heat the air to be admitted to the carbureter, the question of warming such air has always been a serious one. However, with the use of the device described and I claimed herein, the longstanding lack of a heating device has been I claim as my invention:

1. A heating device comprising a frame bent to form an intermediate member and ried by oneg'of the members and said insutwo end members; an insulation on the intermediate member; and heating wires carone end member.

4. A heating device comprising a frame bent to form an intermediate member and two end members oneof which has a threaded end; a nut on said threaded end; aninsulation on the intermediate member; coiled springs onthe end members; and heating, wires carried by the insulation and one end member.

5. In a device as described, the combination of a hot air pipe having a hole therein; a frame in the-pipe comprising an inter mediate member, and two end members; an insulation on said intermediate member; coiled springs on said end members and engaging the sides of the pipe; and heating coils carried by said insulation and one of I "springs on said end members and engaging the sides of the pipe; and heating coi s carrled by said insulation and one of said end members.

7 In a device as described, the combina- 1 tion of a hot air pipe; a frame in said pipe and comprising three members, an insulation on one of the members; heating coils carlation; and; a conductor connected to the said coils at the ends carried by the: insulation. a i i 8. In a device as described, the combination of a hot air pipe; a frame in said pipe and comprising three members, one of which 1 protrudes'through the side of the pipe; a nut on the protruding end of said member; an insulation on one of themembers; heating coils carried by one of the members and said insulation; and a conductor connected 1 .to the said coils at the ends carried by the insulation.

9. In a device as described, the combination of a hot air pipe; a frame in said pipe an'dbent to form an intermediate member 1 and two end members one of which protrudes through the side of the pipe; an insulation on the intermediate member; a conductor secured to said insulation; heating coils secured to said conductor and to one of the end members; and a nut on said protruding member.

10. In a device as described, a hot air pipe connected with a carburetor; a switch mounted on said hot air ipe and comprising,

the combination of an insulated block provided with a longitudinally extending chan- ,nel andv binding posts having their shanks frame; a switch mounted on said pipe and connected with a source of electric current;

an insulated cable havin one end connected to said switch and its ot or end bare of insulation and connected to said heating coils.

12. In a device as described, a hot air pipe connected to a carburetor and having an air heating device therein; a switch mounted on said pipe comprising an insulated block having notches therein; a' channel open at one end connecting said notches; binding-posts in said notches; a coiled spring in said chanv nel between said binding-posts and having one end permanently in contact with one binding-post; means for bringing the other one end connected to a" end of said spring into contact with the ing said switch and said heating device.

13. In a device as described, a hot air pipe having a switch connected to a source of electric current mounted thereon; an air heating device in said pipe comprising a bar 1 bent into a U-shape at each end forming outer and inner member's; spring grips on the outer members engaging the walls of the pipe; an insulation on one inner memberan insulated cable havin one end connected to the said switch and its other end bared and secured to the insulation on said mem 'ber; heating coils connected at one end to the bared end of thecable and the other ends member. 4

14. In a device as described, a hot air pipe; a heating devlce entirely within said pipe and comprisinga frame having U- shapedends forming outer and inner rnembers; coiled springs on the outer members and an insulation on one inner member; a conductor mounted on saidinsulatlon and heating coils secured to said conductor and to the other inner member; v 15. In a device as described, a hot air pipe connected with a carburetor; and a heating means disposed between the inlet of the pipe and the carburetor; v v

16. .A heat er comprising a frame members; heating coils carried on said mem-' Y 7 bers and meansfor connecting sald coils to a source of electric current.

In testimony whereof,,.I have signed my name to this specification.

FRANK CALDWELL .INGALLS.

, connected with the spring grip on one outer 1 other binding-post, and means for connect- 40 

